Adhoc wifi network

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@r4space @vbtdung

Here are two examples with using an Ad-Hoc network, which I verified they are working on two devices connected with each other.

First one is with static IP (you need to change 192.168.2.1 to 192.168.2.2 on the second device):

[connection]
id=Ad-Hoc
uuid=291b2424-9f8c-3d32-bae0-fd5e2c831e68
type=802-11-wireless

[802-11-wireless]
ssid=Ad-Hoc
mode=adhoc

[ipv4]
method=manual
address1=192.168.2.1/24,0.0.0.0

[ipv6]
method=ignore

After this you may ping both of those devices from each other.

Another way is with a local-link method:

[connection]
id=Ad-Hoc
uuid=291b2424-9f8c-3d32-bae0-fd5e2c831e68
type=802-11-wireless

[802-11-wireless]
ssid=Ad-Hoc
mode=adhoc

[ipv4]
method=link-local

[ipv6]
method=ignore

You may also use method=auto on one of the devices, but then you will need to run a DHCP service (e.g. dnsmasq) on the other device, so that IP addresses are assigned.

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